Re: patch for info threads problem with target arm-elf (PR 1199).

[Andrew Cagney <ac131313 at redhat dot com>]

> -  /* Avoid coredumps which would happen if we tried to access a NULL
> -     deprecated_selected_frame.  */
> -  if (!target_has_stack)
> -    error ("No stack.");
> +  /* Check that there really is a frame.  This happens when a simulator
> +     is connected but not loaded or running, for instance.  */
> +  if (saved_frame_level < 0)
> +    error ("No frame.");

This would only happen to old architectures (legacy_get_prev_frame). 
With new architectures (get_prev_frame), frame creation is so lazy that 
an inner most frame is (hopefully?) always created.  Can you make this 
check conditional on legacy_frame_p?

Andrew